Thanks for the response.
I could configure openssh-server to execute a Perl program upon connection, but that would require user accounts on the server. I would also lose a lot of control if the connections were handled by OpenSSH.
The goal is to create a self-contained Perl program (it's fine if it requires external modules) that listens on port 22. For simplicity, it can be a basic echo server. I'll connect by entering ssh localhost and it will echo back the lines I enter.
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